Clueme: Investigate the crime

In this first-person game you are Eveny, a private investigator trying to find out the perpetrator of the crime.
You will have to interrogate characters in the mansion.
Is the butler lying? Is the Count's friend telling the truth?
Talk to each guest, and find out where they were at the time of the crime and with whom.
Solve puzzles to open the safe, and find clues that will allow you to find the murder weapon and different evidence to solve the mystery of the crime.